It's something out of a progressive fantasy. Google announced that it has bought the entire 240-megawatt output of a wind farm in Texas to offset the massive amounts of energy its data centers consume. Oh, and the wind farm is owned by a Native American company, Chermac Energy. But Chermac won’t be able to directly supply a Google data center. Instead it will pipe the electricity it produces into the Texas grid. In effect, Google is offsetting the not-so-green electricity it uses by paying for these earth-friendlier initiatives. This is the fifth, and by far the largest, such long-term green-energy deal that the search giant has struck.